//using namespace std;
//#include <iostream>
//
//int main()
//{
//	cout << "hello world" << endl;
//	//return 0;
//}
/**
using namespace std;
#include <iostream>
int main()
{
	cout << "hello world" << endl;
	return 0;
}
*/
//using namespace std;
//#include <iostream>
//#define DAY 7
//int main()
//{
//	const int a = 0;
//	/*cout << "a="<< DAY<< endl;*/
//	cout << "a week of days are " << DAY << "!" << endl;
//	cout << "a week of days are " << DAY << "!" << endl;
//
//	return 0;
//}
//using namespace std;
//#include<iostream>
//int main()
//{
//	short num1 = 9;
//	long number2 = 3;
//	double number3 = 90;
//	cout << "the sizeof short is " <<   sizeof(num1) << endl;
//	cout << "the sizeof long is " << sizeof(number2) << endl;
//	cout << "the sizeof double is " << sizeof(double) << endl;
//
//	return 0;
//}
//using namespace std;
//#include <iostream>
//int main()
//{
//	float a = 3e-2;
//	cout << "a=" << a << endl;
//	return 0;
//}

//using namespace std;
//#include <iostream>
//#include <string.h>
//int main()
//{
//	char ch[] = "0";
//	string ch = "abvsndmj";
//	string jiayou = "asdfgg";
//	cout << jiayou << endl;
//	return 0;
//}
//#include <stdio.h>
//int main()
//{
//	int arr[100] = { 1,2,3,4,5,55,67,46,78 };
//	int find = 0;
//	scanf("%d", &find);
//	int number = 0;
//	int right = sizeof(arr) / sizeof(arr[0]);
//	int left = 0;
//	int mid = (left + right) / 2;
//	while (left <= right)
//	{
//		if (arr[mid] == find)
//		{
//			printf("the right number is:%d\n", arr[mid]);
//			break;
//		}
//	}
//	return 0;
//}
//1,3,4
//1,2,3,4
